Crocs Men's Harborline Shoe 100% Leather Synthetic sole Shaft measures approximately 16" from arch Heel measures approximately 2.5" Boot opening measures approximately 15.5" around Perforated insole with circulation nubs Croslite sole Gore panels for easy on/off Classic boat shoe details lend a casual look while the side grommets and perforated footbed maintain a comfortable interior with or without socks.